pocket of cold air, strong cold front, this is going to bring the return of some very wet weather to the bay area, very cold temperatures, even low snow levels. in fact we'll advance our forecast. tuesday morning, just in time nor commute, rain returns and, boy, it's going to be a cold rain. 7:00, 8:00, 9:00, 10:00, the cold front moves across the bay area and it will continue to slide south. so tuesday and wednesday, prepare for colder and wetter conditions, here's a look at the lows tonight. a few fasting -- passing clouds. upper 30s. san francisco, 46. and here's a look at the highs for sunday. 65 for los gatos. temperatures coming done a few degrees. half moon bay, 56 tomorrow. 63, palo alto. san francisco, still sunny but cooler, 63. north bay, 67. santa rosa, 63.